Traditionally, a web page has to send a request to the server to receive new data; that is, the page requests data from the server. With server-sent events, it's possible for a server to send new data to a web page at any time, by pushing messages to the web page. These incoming messages can be treated as 事件 + data inside the web page.
To learn how to use server-sent events, see our article 使用服务器发送事件 .
EventSource
Defines all the features that handle connecting to a server, receiving events/data, errors, closing a connection, etc.
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HTML 实时标准
在该规范中的 Server-sent events 定义。 |
实时标准 |